Etymologies

fault +‎ -less (Wiktionary)

Examples

(Hebrew Bible, Jeremiah 49: 11) “Religion that God our Father accepts as pure and faultless is this: to look after orphans and widows in their distress and to keep oneself from being polluted by the world.”

By each mail steamer, in faultless English, typewritten on an American machine, a letter goes from Macao to Honolulu, in which, by admirable texts and precepts, Ah Chun advises his family to live in unity and harmony.

It's a wonderful collection of texts, and just goes to show that a nation's most loved literature does not have to be printed on glossy paper, does not even have to couched in faultless English to find a lasting place in the heart of its people.

Indian interpreters do their stuff in faultless Anglo-Indian or Indo-Anglian ( "Actually her given name is Bhoomi, the earth, but her friends are calling her by this Boonyi cognomen which, sir, is the beloved tree of Kashmir").

Different times followed, which I don't want to discuss here now -- we should not discuss anything on this occasion -- but the faultless conduct ceased to be, as did our obligations toward what we might describe as a faultless conduct.

She recalled the faultless grace and beauty of his person, and revelled in the thought of it, till suddenly a deep and sensuous glow of delight in him flooded her being, and her very soul was faint for him.